/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.table.runtime.join

import org.apache.flink.types.Row
import org.apache.flink.util.Collector

/**
  * This collector is used to count how many rows have been collected. It will not collect data
  * actually.
  */
class CountingCollector extends Collector[Row] {
  // count how many records may be emitted
  private var emitCnt: Long = 0L

  override def collect(record: Row): Unit = emitCnt += 1

  def reset(): Unit = emitCnt = 0

  def getEmitCnt: Long = emitCnt

  override def close(): Unit = {}
}
